Search for Large-scale Anisotropy in the Arrival Direction of Cosmic Rays with KASCADE-Grande

被引：11

作者：

Apel, W. D. ^{[1
]}

Arteaga-Velazquez, J. C. ^{[2
]}

Bekk, K. ^{[1
]}

Bertaina, M. ^{[3
]}

Bluemer, J. ^{[1
,4
,15
]}

Bonino, R. ^{[3
]}

Bozdog, H. ^{[1
]}

Brancus, I. M. ^{[5
]}

Cantoni, E. ^{[3
,16
]}

Chiavassa, A. ^{[3
]}

Cossavella, F. ^{[4
,17
]}

Daumiller, K. ^{[1
]}

de Souza, V ^{[6
]}

Di Pierro, F. ^{[7
]}

Doll, P. ^{[1
]}

Engel, R. ^{[1
]}

Fuhrmann, D. ^{[8
,18
]}

Gherghel-Lascu, A. ^{[5
]}

Gils, H. J. ^{[1
]}

Glasstetter, R. ^{[8
]}

Grupen, C. ^{[9
]}

Haungs, A. ^{[1
]}

Heck, D. ^{[1
]}

Horandel, J. R. ^{[10
]}

Huege, T. ^{[1
]}

Kampert, K-H ^{[8
]}

Kang, D. ^{[1
]}

Klages, H. O. ^{[1
]}

Link, K. ^{[11
]}

Luczak, P. ^{[1
]}

Mathes, H. J. ^{[1
]}

Mayer, H. J. ^{[1
]}

Milke, J. ^{[1
]}

Mitrica, B. ^{[5
]}

Morello, C. ^{[12
]}

Oehlschlagerl, J. ^{[1
]}

Ostapchenko, S. ^{[13
]}

Pierog, T. ^{[1
]}

Rebel, H. ^{[1
]}

Roth, M. ^{[1
]}

Schieler, H. ^{[1
]}

Schoo, S. ^{[1
,19
]}

Schroder, F. G. ^{[1
]}

Sima, O. ^{[14
]}

Toma, G. ^{[5
]}

Trinchero, G. C. ^{[12
]}

Ulrich, H. ^{[1
]}

Weindl, A. ^{[1
]}

Wochele, J. ^{[1
]}

Zabierowski, J. ^{[11
]}

机构：

[1] Karlsruher Inst Technol, Inst Kernphys, Karlsruhe, Germany

[2] Univ Michoacana, Inst Phys & Math, Morelia, Michoacan, Mexico

[3] Univ Torino, Dipartimento Fis, Turin, Italy

[4] Karlsruher Inst Technol, Inst Expt Teilchenphys, Karlsruhe, Germany

[5] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[6] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Paulo, Brazil

[7] Ist Nazl Fis Nucl, Sez Torino, Turin, Italy

[8] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[9] Siegen Univ, Dept Phys, Siegen, Germany

[10] Radboud Univ Nijmegen, Dept Astrophys, Nijmegen, Netherlands

[11] Natl Ctr Nucl Res, Dept Astrophys, Lodz, Poland

[12] INAF Torino, Osservatorio Astrofis Torino, Turin, Italy

[13] Frankfurt Inst Adv Studies, Frankfurt, Germany

[14] Univ Bucharest, Dept Phys, Bucharest, Romania

[15] Karlsrhuer Inst Technol, Div 5, Karlsruhe, Germany

[16] INRIM, Ist Nazl Ric Metrolog, Turin, Italy

[17] DLR Oberpfaffenofen, Wessling, Germany

[18] Univ Duisburg Essen, Duisburg, Germany

[19] Siemens AG, Munich, Germany

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 870卷 / 02期

关键词：

astroparticle physics; cosmic rays; MUONS;

D O I：

10.3847/1538-4357/aaf1ca

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of the search for large-scale anisotropies in the arrival directions of cosmic rays performed with the KASCADE-Grande experiment at energies higher than 10(15) eV. To eliminate spurious anisotropies due to atmospheric or instrumental effects we apply the east-west method. We show, using the solar time distribution of the number of counts, that this technique allow us to remove correctly the count variations not associated to real anisotropies. By applying the east-west method we obtain the distribution of number of counts in intervals of 20 minutes of sidereal time. This distribution is then analyzed by searching for a dipole component; the significance of the amplitude of the first harmonic is 3.5 sigma, therefore, we derive its upper limit. The phase of the first harmonic is determined with an error of a few hours and is in agreement with the measurements obtained in the 10(14) < E < 2 x 10(15) eV energy range by the EAS-TOP, IceCube, and IceTop experiments. This supports the hypothesis of a change of the phase of the first harmonic at energies greater than similar to 2 x 10(14) eV.

引用

页数：5

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